Great feel, suitable for slower rock/metal beats, but also you can go really fast with these and get a proper double kick with a high spring tension, which is quite easy and quick to do.
The only small negative thing is that you can't adjust both the pedal and beater angle on the main pedal (what you can do on slave pedal). The footboard moves higher/lower as moving the beater. But it's quite a small thing so it hasn't bothered me that much or prevented to get a good feel on bothpedals.
Overall a great pedal, with a great price-quality ratio.